sample update for using dynamic config
rearranging config map
adding PayPal image to samples
updated config method names in samples
updated wiki links in README.md and Configuration.php
Merge pull request #8 from paypal/sampleupdate103

sample update for using dynamic config
Update Configuration.php
updated version and CHANGELOG.md
Updated sdk version
Merge pull request #10 from paypal/rel-2.5.106

106 release